In short: we owe it to those who use XMPP technologies to improve the
security of the network (and thanks to Thijs Alkemade, we now have
better ways to test such security, using the newly-launched "IM
Observatory" at xmpp.net). Although we know that channel encryption is
not the complete answer, it's the right thing to do because it will
help to protect people's communications from prying eyes.